DISPLAY APPARATUS UTILIZING INDEPENDENT CONTROL OF LIGHT SOURCES FOR UNIFORM BACKLIGHT OUTPUT

摘要

This disclosure provides systems, methods and apparatus for improving light output resolution of a backlight by individually controlling light sources in the backlight. Illumination intensity levels of light sources are individually controlled such that an overall illumination intensity level of all the light sources is substantially equal to a desired whole backlight illumination intensity value. The individual illumination levels of the light sources or a group of the light sources is controlled such that the backlight is uniformly illuminated. In some implementations, the illumination intensity levels are varied over different portions of an illumination period to provide uniform illumination of the backlight.

主权项

1. An apparatus, comprising:
a backlight; a plurality of light sources associated with a first color; and illumination control logic coupled to the plurality of light sources configured to:
independently control a number of groups of the light sources to output a plurality of discrete output illumination intensity levels,receive an input signal indicating a discrete whole backlight illumination intensity value for the first color to be output by the backlight, andin response to the input signal indicating a whole backlight illumination intensity value that is not an integer multiple of the number of groups, controlling at least one of the groups to be illuminated at a lesser intensity level than a remainder of the groups such that an illumination output of the backlight is substantially uniform across its surface and the total illumination intensity level of the groups of light sources is substantially equal to the whole backlight illumination intensity value indicated in the received input signal.